JP2005060038A - Endless belt - Google Patents

Endless belt Download PDF

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JP2005060038A
JP2005060038A JP2003292882A JP2003292882A JP2005060038A JP 2005060038 A JP2005060038 A JP 2005060038A JP 2003292882 A JP2003292882 A JP 2003292882A JP 2003292882 A JP2003292882 A JP 2003292882A JP 2005060038 A JP2005060038 A JP 2005060038A
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belt
reinforcing member
endless belt
meandering
peripheral surface
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Kazuya Kitamura
一矢 北村
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Minolta Co Ltd
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Minolta Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an endless belt increasing life by keeping a reinforcing effect by a reinforcing member for a long time. <P>SOLUTION: The reinforcing member 11 made of material having no tensile yield elongation is affixed to an inner peripheral surface or an outer peripheral surface of at least one end portion in a width direction of the endless belt 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、複写機やプリンタ等の画像形成装置において、中間転写ベルトや定着ベルトやベルト感光体等に使用される無端状ベルトに関し、特に、無端状ベルトの幅方向の端部を補強するために、無端状のベルトの幅方向における少なくとも一方の端部に沿って補強部材を設けた無端状ベルトに関するものである。   The present invention relates to an endless belt used for an intermediate transfer belt, a fixing belt, a belt photoreceptor, and the like in an image forming apparatus such as a copying machine and a printer, and more particularly to reinforce the end in the width direction of the endless belt. Further, the present invention relates to an endless belt provided with a reinforcing member along at least one end in the width direction of the endless belt.

従来、図１に示すように、ベルトにテンションを付与するために両端部がスプリング１６によってそれぞれ付勢されたローラ１４と、このローラ１４から離れて平行に配置されたローラ１２とに掛け渡された無端状ベルト１０を矢印Ａ方向に回転駆動させる場合、ベルト１０の幅方向端部の周長差、ローラ１２，１４の両端部側外径差や回転振れ、各ローラ同士の平行度、ローラ１４の両端部間でのスプリング１６の付勢力の差などに起因して、ベルト１０に蛇行が発生する。   Conventionally, as shown in FIG. 1, both ends of the belt are urged by springs 16 to apply tension to the belt, and the rollers 12 are spaced apart from the rollers 14 and arranged in parallel. When the endless belt 10 is rotationally driven in the direction of arrow A, the circumferential length difference of the belt 10 in the width direction, the outer diameter difference or rotational deflection of both ends of the rollers 12 and 14, the parallelism between the rollers, the roller The belt 10 meanders due to the difference in the biasing force of the spring 16 between the both ends of the belt 14.

この蛇行を規制する方法として、図２に示すように、ベルト１０の幅方向の端部をベルト蛇行規制部材１８に押し当てて規制する方式や、図３に示すように、ベルト１０の幅方向の端部における内周面にゴム等からなるガイド部材１３を設け、このガイド部材１３をベルト蛇行規制部材１８に押し当てて規制する方式が知られている。いずれの方式においても、ベルト１０の蛇行が規制されているその端部での割れを防止するため、ベルト端部には補強部材１１が設けられているケースが多い。なお、図３（Ａ）はベルト１０の両端部にガイド部材１３を設けた例であり、図３（Ｂ）はベルト１０の一方の端部にガイド部材１３を設けた例である。   As a method for restricting the meandering, as shown in FIG. 2, a method of restricting the belt 10 by pressing the end portion in the width direction of the belt 10 against the belt meandering restricting member 18, or a width direction of the belt 10 as shown in FIG. There is known a system in which a guide member 13 made of rubber or the like is provided on the inner peripheral surface at the end of the belt, and the guide member 13 is pressed against the belt meandering restricting member 18 for restriction. In any method, in order to prevent cracking at the end portion where the meandering of the belt 10 is restricted, the belt end portion is often provided with a reinforcing member 11. 3A is an example in which guide members 13 are provided at both ends of the belt 10, and FIG. 3B is an example in which the guide members 13 are provided at one end of the belt 10. FIG.

無端状ベルト１０の幅方向の端部をベルト蛇行規制部材１８に押し当てて蛇行を規制する方式を採用する場合、ベルト端部がベルト蛇行規制部材１８に強く押し付けられると、ベルト端部にひび割れ等の損傷が発生する。これを防止すべく、下記特許文献１には、ベルト１０の端部に、曲げ弾性率を規定した補強部材を設けることが開示されている。   When adopting a system in which the end of the endless belt 10 in the width direction is pressed against the belt meandering restricting member 18 to restrict meandering, if the belt end is strongly pressed against the belt meandering restricting member 18, the end of the belt cracks. Such damage will occur. In order to prevent this, Patent Document 1 below discloses that a reinforcing member defining a bending elastic modulus is provided at an end portion of the belt 10.

また、ベルト１０の端部にガイド部材１３を設けて、このガイド部材１３により蛇行を規制する方式を採用する場合については、ベルト１０の端部を十分に補強するために補強部材１１の強度や厚みを大きくすると、補強部材１１が設けられている部分と設けられていない部分との境界線で亀裂が発生したり、ベルト１０から補強部材１１が剥がれるといった問題がある。これを防止すべく、下記特許文献２では、補強部材１１の強度がベルト１０の幅方向端部側より中央部側の方が弱くなるようにすることが開示されている。   Further, in the case where the guide member 13 is provided at the end of the belt 10 and the method of restricting meandering by the guide member 13 is adopted, the strength of the reinforcing member 11 is sufficiently increased to sufficiently reinforce the end of the belt 10. When the thickness is increased, there is a problem that a crack occurs at the boundary line between a portion where the reinforcing member 11 is provided and a portion where the reinforcing member 11 is not provided, or the reinforcing member 11 is peeled off from the belt 10. In order to prevent this, the following Patent Document 2 discloses that the strength of the reinforcing member 11 is weaker at the center side than at the width direction end side of the belt 10.

特開平８−６３０００号公報JP-A-8-63000 特開２００２−１３９９６０号公報JP 2002-139960 A

しかしながら、補強部材１１の強度がベルト１０の幅方向端部側より中央部側で弱くなるようにするための具体的構成は、補強部材１１の厚みをベルト幅方向で変化するように形成したり、あるいは、幅の異なる２つ以上の補強部材１１を使用したりするもので、コストアップとなる要素が高い。このような方策を採らなくても、ベルト割れの原因を考察すれば、補強部材１１の材質を最適にすることでベルト割れを回避できることが判明した。   However, a specific configuration for making the strength of the reinforcing member 11 weaker on the center side than on the side in the width direction of the belt 10 is such that the thickness of the reinforcing member 11 changes in the belt width direction. Alternatively, two or more reinforcing members 11 having different widths are used, and the cost increases. Even if such measures are not taken, it has been found that the belt cracking can be avoided by optimizing the material of the reinforcing member 11 if the cause of the belt cracking is considered.

そこで、本発明の無端状ベルトは、コストアップさせることなく、長寿命化を図ることを目的とするものである。   Therefore, the endless belt of the present invention is intended to extend the life without increasing the cost.

前記目的を達成するために本発明の無端状ベルトは、無端状のベルトの幅方向における少なくとも一方の端部の内周面または外周面に、引張降伏伸びを有しない材質からなる補強部材を貼着したことを特徴とするものである。   In order to achieve the above object, the endless belt of the present invention has a reinforcing member made of a material having no tensile yield elongation on the inner peripheral surface or outer peripheral surface of at least one end in the width direction of the endless belt. It is characterized by wearing.

本発明の無端状ベルトでは、前記補強部材が、前記ベルト以上のヤング率を有することが好ましい。   In the endless belt of the present invention, it is preferable that the reinforcing member has a Young's modulus higher than that of the belt.

また、本発明の無端状ベルトは、前記補強部材が貼着されたベルトの幅方向における端部に、ベルト蛇行規制用のガイド部材を設けてもよい。   Further, the endless belt of the present invention may be provided with a guide member for belt meandering restriction at an end portion in the width direction of the belt to which the reinforcing member is attached.

また、本発明の無端状ベルトは、前記補強部材がポリイミド樹脂またはポリエチレンナフタレート樹脂からなってもよい。   In the endless belt of the present invention, the reinforcing member may be made of polyimide resin or polyethylene naphthalate resin.

さらに、本発明の無端状ベルトは、前記補強部材の厚みが１００μｍ以下であることが好ましい。   Furthermore, in the endless belt of the present invention, the reinforcing member preferably has a thickness of 100 μm or less.

本発明の無端状ベルトによれば、無端状のベルトの幅方向における少なくとも一方の端部の内周面または外周面に補強部材を貼着するにあたり、この補強部材が引張降伏伸びを有しない材質からなるものとすることで、ベルト端部に引張力が作用しても補強部材が塑性変形して永久ひずみが残ってしまうことがない。これにより、補強部材のうき・しわの発生が防止されて補強効果が損なわれず、無端状ベルトを長期にわたって安定して使用することができる。   According to the endless belt of the present invention, when the reinforcing member is attached to the inner peripheral surface or the outer peripheral surface of at least one end in the width direction of the endless belt, the reinforcing member does not have a tensile yield elongation. Therefore, even if a tensile force is applied to the belt end, the reinforcing member is not plastically deformed and permanent set does not remain. As a result, the generation of wrinkles and wrinkles in the reinforcing member is prevented and the reinforcing effect is not impaired, and the endless belt can be used stably over a long period.

また、前記補強部材が前記ベルト以上のヤング率を有していれば、ベルト端部に引張力が作用しても補強部材の厚みが薄くても歪みにくく、引張力に対する補強効果がより一層増大する。   Further, if the reinforcing member has a Young's modulus higher than that of the belt, even if a tensile force acts on the belt end portion, even if the reinforcing member is thin, it is not easily distorted, and the reinforcing effect on the tensile force is further increased. To do.

以下、本発明の実施の形態について添付図面を参照して説明する。
図１は、本発明の一実施形態である無端シート状ベルト１０を用いたベルト駆動装置１を示す。このベルト駆動装置１では、所定距離だけ離れて平行に配置された２つのローラ１２，１４に無端シート状ベルト１０が掛け渡されている。ローラ１４の両端部はスプリング１６によってローラ１２から離れる方向に付勢されており、これによりベルト１０には例えば３０Ｎの張力が付与されている。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a belt driving apparatus 1 using an endless sheet-like belt 10 according to an embodiment of the present invention. In this belt drive device 1, the endless sheet-like belt 10 is stretched around two rollers 12 and 14 arranged in parallel at a predetermined distance. Both ends of the roller 14 are urged in a direction away from the roller 12 by the spring 16, whereby a tension of 30 N, for example, is applied to the belt 10.

ベルト１０の具体的構成を例示すれば、周長５８０ｍｍ、幅２６０ｍｍ、厚さ１５０μｍで、主成分がポリカーボネート（すなわちＰＣ、ヤング率１６００Ｎ／ｍｍ２）からなるものと、ポリフェニレンサルファイド（すなわちＰＰＳ、ヤング率１５００Ｎ／ｍｍ２）からなるものの２種類がある。両方の種類ともに、カーボンブラックを分散して、表面抵抗が１０８〜１０１２Ω／□（Ω／ｃｍ２）となるように調整されている。 For example, a specific configuration of the belt 10 includes a peripheral length of 580 mm, a width of 260 mm, a thickness of 150 μm, a main component made of polycarbonate (that is, PC, Young's modulus 1600 N / mm 2 ), and polyphenylene sulfide (that is, PPS, Young). There are two types, one with a rate of 1500 N / mm 2 ). In both types, the carbon black is dispersed and the surface resistance is adjusted to be 10 8 to 10 12 Ω / □ (Ω / cm 2 ).

２つのローラ１２，１４のうち、一方のローラが駆動ローラ（例えば直径２０ｍｍ）で、他方のローラが従動ローラ（例えば直径２５ｍｍ）であり、駆動ローラが図示しないモータによって駆動されることによりベルト１０は例えば２００ｍｍ／ｓの速度で矢印Ａ方向に回転駆動されるようになっている。   Of the two rollers 12 and 14, one roller is a driving roller (for example, 20 mm in diameter), the other roller is a driven roller (for example, 25 mm in diameter), and the driving roller is driven by a motor (not shown), whereby the belt 10 is driven. Is driven to rotate in the direction of arrow A at a speed of, for example, 200 mm / s.

前記ベルト駆動装置１におけるベルト蛇行防止機構としては、図３（Ｂ）に示す方式のものを採用している。すなわち、ベルト１０の幅方向における一方の端部の内周面に、ベルト蛇行規制用のガイド部材１３が接着されている。ガイド部材１３は、例えば、幅４ｍｍで厚さ１ｍｍのウレタンゴムからなる。   As the belt meandering preventing mechanism in the belt driving device 1, the system shown in FIG. 3B is adopted. That is, a belt meandering restricting guide member 13 is bonded to the inner peripheral surface of one end in the width direction of the belt 10. The guide member 13 is made of urethane rubber having a width of 4 mm and a thickness of 1 mm, for example.

ガイド部材１３は、円盤状のベルト蛇行規制部材１８の外周面に形成された断面矩形状のガイド溝内に多少の隙間をもって嵌り込んでいる。ベルト蛇行規制部材１８は、例えばポリアセタール（ＰＯＭ）からなり、ローラ１２から独立して回転可能になっており、ベルト１０の回転によるガイド部材１３の移動にしたがって従動回転するようになっている。   The guide member 13 is fitted in a guide groove having a rectangular cross section formed on the outer peripheral surface of the disk-shaped belt meandering restricting member 18 with a slight gap. The belt meandering restricting member 18 is made of, for example, polyacetal (POM), is rotatable independently of the roller 12, and is driven to rotate as the guide member 13 is moved by the rotation of the belt 10.

ガイド部材１３を設けたベルト１０の端部の外周面には、テープ状の補強部材１１が接着剤によって貼着されている。補強部材１１は、引張降伏伸びを有しない材質からなっており、その材質としては例えばポリイミド樹脂（ＰＩ）やポリエチレンナフタレート樹脂（ＰＥＮ）などが好適に用いられる。このように補強部材１１の材質として引張降伏伸びを有しないものを用いれば、蛇行規制されるときにベルト端部に引張力が作用しても補強部材１１が塑性変形して永久ひずみが残ってしまうことがなく、これにより補強部材１１のうき・しわの発生が防止されて補強効果が損なわれず、無端状ベルトを長期にわたって安定して使用することができる。   A tape-shaped reinforcing member 11 is attached to the outer peripheral surface of the end portion of the belt 10 provided with the guide member 13 with an adhesive. The reinforcing member 11 is made of a material that does not have a tensile yield elongation. For example, polyimide resin (PI) or polyethylene naphthalate resin (PEN) is preferably used as the material. As described above, if a material having no tensile yield elongation is used as the material of the reinforcing member 11, the reinforcing member 11 is plastically deformed and a permanent strain remains even when a tensile force is applied to the belt end when the meandering is restricted. Thus, the reinforcing member 11 is prevented from being creased or wrinkled, and the reinforcing effect is not impaired, and the endless belt can be used stably over a long period of time.

また、補強部材１１はベルト１０以上のヤング率を有しいることが好ましい。これにより、ベルト端部に引張力が作用しても補強部材１１の厚みが薄くても歪みにくく、引張力に対する補強効果がより一層増大する。この場合、補強部材１１の厚みが大きくなると、補強部材１１のこしが強くなってベルト１０からはがれやすくなるので、その厚みは１００μｍ以下であることが好ましい。   Further, the reinforcing member 11 preferably has a Young's modulus equal to or higher than that of the belt 10. Thereby, even if a tensile force acts on the belt end portion, even if the thickness of the reinforcing member 11 is thin, it is not easily distorted, and the reinforcing effect against the tensile force is further increased. In this case, when the thickness of the reinforcing member 11 is increased, the reinforcing member 11 is strongly strained and easily peeled off from the belt 10. Therefore, the thickness is preferably 100 μm or less.

なお、本実施形態におけるベルト１０では、図４（Ａ）に示すようにベルト端部の内周面にガイド部材１３を接着する一方でその外周面に補強部材１１を接着したが、図４（Ｂ）に示すようにベルト端部の内周面に補強部材１１を接着して、その上にガイド部材１３を接着してもよい。   In the belt 10 according to the present embodiment, as shown in FIG. 4A, the guide member 13 is bonded to the inner peripheral surface of the belt end, while the reinforcing member 11 is bonded to the outer peripheral surface. As shown in B), the reinforcing member 11 may be bonded to the inner peripheral surface of the belt end portion, and the guide member 13 may be bonded thereon.

上述したベルト駆動装置１のように、無端状ベルト１０の端部における内周面にゴム等のガイド部材１３を設けて蛇行規制する方式では、補強部材１１として求められる重要な特性値は引張試験によるものである。ベルト１０が回転するときに蛇行が大きいと、ガイド部材１３がベルト蛇行規制部材１８のガイド溝１８ａの側壁に一時的に乗り上げかかることがある。   As in the belt driving device 1 described above, in a method in which the guide member 13 such as rubber is provided on the inner peripheral surface of the end portion of the endless belt 10 and the meandering is restricted, an important characteristic value required as the reinforcing member 11 is a tensile test. Is due to. If the meandering is large when the belt 10 rotates, the guide member 13 may temporarily run over the side wall of the guide groove 18a of the belt meandering restricting member 18.

図５（Ａ）に示すように、ベルト１０が蛇行により矢印Ｐ方向に移動して、ガイド部材１３がガイド溝１８ａの内側側壁に乗り上げかかったとき、ベルト１０には引張応力が発生し、この引張応力がベルト１０の材質の引張降伏強さを超えるとベルト１０の端部近傍領域Ｑでベルト割れが生じやすい。   As shown in FIG. 5A, when the belt 10 moves in the direction of the arrow P due to meandering and the guide member 13 rides on the inner side wall of the guide groove 18a, tensile stress is generated on the belt 10, If the tensile stress exceeds the tensile yield strength of the material of the belt 10, belt cracking is likely to occur in the region Q near the end of the belt 10.

一方、図５（Ｂ）に示すように、ベルトが蛇行により矢印Ｒ方向に移動して、ガイド部材１３がガイド溝１８ａの外側側壁に乗り上げかかったとき、ベルト１０には座屈方向の力が作用することになるが、ベルト端部領域Ｓについて見るとやはり引張応力が発生しており、この引張応力がベルト１０の材質の引張降伏強さを超えるとベルト１０の端部領域Ｓでベルト割れが生じやすい。   On the other hand, as shown in FIG. 5B, when the belt moves in the direction of the arrow R due to meandering and the guide member 13 rides on the outer side wall of the guide groove 18a, the belt 10 has a buckling force. However, when the belt end region S is seen, tensile stress is generated, and if this tensile stress exceeds the tensile yield strength of the material of the belt 10, the belt cracks in the end region S of the belt 10. Is likely to occur.

また、補強部材１１が引張降伏伸びを有する材質からなる場合には、ベルト端部に引張降伏強さを超える引張応力が作用すると、補強部材１１が塑性変形して永久ひずみを生じてしまい、これにより図６に示すように補強部材１１にうき・しわＴが発生する。その結果、うき・しわＴが発生した箇所では補強部材１１がその補強効果を発揮し得ないことから、その箇所でベルト割れが発生することになる。   Further, when the reinforcing member 11 is made of a material having tensile yield elongation, if a tensile stress exceeding the tensile yield strength acts on the belt end, the reinforcing member 11 is plastically deformed to cause permanent strain. As a result, wrinkles / wrinkles T are generated in the reinforcing member 11 as shown in FIG. As a result, since the reinforcing member 11 cannot exhibit the reinforcing effect at the portion where the crease / wrinkle T occurs, the belt cracks at that portion.

そこで、本実施形態のベルト１０では、上述したような補強部材１１のうき・しわＴの発生を防止してベルト割れが生じないようにするために、補強部材１１が引張降伏伸びを有しない材質からものとしたものである。   Therefore, in the belt 10 of the present embodiment, the reinforcing member 11 does not have a tensile yield elongation in order to prevent the occurrence of the crease / wrinkle T of the reinforcing member 11 and prevent the belt from cracking. From

なお、上述したヤング率、引張降伏強さ、引張降伏伸びは、引張試験によって得られる値であり、この引張試験についてはＪＩＳ・Ｋ７１２７「プラスチックの引張試験方法」に記載されている。図７に示すように、引張降伏強さＶとは「荷重−伸び曲線上で荷重の増加なしに伸びの増加が認められる最初の点における引張応力」であり、引張降伏伸びとは「引張降伏強さに対応する伸び」である。   The above-mentioned Young's modulus, tensile yield strength, and tensile yield elongation are values obtained by a tensile test, and this tensile test is described in JIS K7127 “Plastic tensile test method”. As shown in FIG. 7, the tensile yield strength V is “the tensile stress at the first point at which an increase in elongation is recognized without an increase in load on the load-elongation curve”. “Elongation corresponding to strength”.

次に、本実施形態のベルト駆動装置１を用いて行ったベルト１０の耐久試験について説明する。
この耐久試験では、ローラ１２の一端部を他端部に対して１ｍｍ高くすることによりローラ１２，１４間の平行度をずらした状態で、ベルト１０を５０万回転させてベルト割れが発生するかどうかを調べた。 Next, a durability test of the belt 10 performed using the belt driving device 1 of the present embodiment will be described.
In this durability test, whether the belt 10 is broken 500,000 times by causing the belt 10 to rotate 500,000 in a state where the parallelism between the rollers 12 and 14 is shifted by raising one end of the roller 12 to the other end by 1 mm. I checked.

耐久試験におけるベルト駆動装置１のベルト１０、ローラ１２，１４、ガイド部材１３についての各種条件は、上述した各具体例のものを用いた。また、ベルト１０に接着した補強部材１１については、それぞれ厚さ５０μｍおよび幅１２ｍｍで、材質がポリイミド（ＰＩ）、ポリエチレンナフタレート（ＰＥＮ）、ポリエチレンテレフタレート（ＰＥＴ）、ポリフェニレンサルファイド（ＰＰＳ）の４種類のものを用いた。   As the various conditions for the belt 10, the rollers 12, 14, and the guide member 13 of the belt driving device 1 in the durability test, the above-described specific examples were used. Further, the reinforcing member 11 bonded to the belt 10 has a thickness of 50 μm and a width of 12 mm, respectively. The material is polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), and polyphenylene sulfide (PPS). The thing of was used.

その耐久試験の結果を下記の表に示す。

Figure 2005060038
The results of the durability test are shown in the following table.
Figure 2005060038

上記表に示すように、補強部材１１の厚さが５０μｍの場合、ポリエチレンテレフタレート（ＰＥＴ）およびポリフェニレンサルファイド（ＰＰＳ）については、耐久開始から１万回転したあたりで、補強部材１１にうき・しわが発生し、その箇所からベルト１０に亀裂が生じて破損したが、ポリイミド（ＰＩ）およびポリエチレンナフタレート（ＰＥＮ）については、５０万回転させてもベルト１０は破損することなく安定して回転していた。   As shown in the above table, when the thickness of the reinforcing member 11 is 50 μm, for the polyethylene terephthalate (PET) and polyphenylene sulfide (PPS), the reinforcing member 11 has wrinkles and wrinkles after 10,000 rotations from the start of durability. The belt 10 was cracked and damaged from that point. Polyimide (PI) and polyethylene naphthalate (PEN) were stably rotated without damage even after 500,000 rotations. It was.

一方、補強部材１１の厚さが１００μｍの場合、ヤング率の比較的高いポリエチレンナフタレート（ＰＥＮ）およびポリエチレンテレフタレート（ＰＥＴ）の各補強部材１１では、１０万回転したあたりから補強部材１１がはがれてきて、その箇所からベルト１０に亀裂が生じて破損した。また、厚み１００μｍのポリフェニレンサルファイド（ＰＰＳ）の補強部材１１では、はがれは生じないものの、１０万回転あたりで補強部材１１のうき・しわが発生し、その箇所からベルト１０に亀裂が生じて破損した。   On the other hand, when the thickness of the reinforcing member 11 is 100 μm, each of the reinforcing members 11 of polyethylene naphthalate (PEN) and polyethylene terephthalate (PET) having a relatively high Young's modulus peels off the reinforcing member 11 around 100,000 revolutions. Then, the belt 10 was cracked and damaged from the portion. Further, in the reinforcing member 11 made of polyphenylene sulfide (PPS) having a thickness of 100 μm, the peeling and wrinkling of the reinforcing member 11 occurred at about 100,000 rotations, and the belt 10 was cracked and damaged from that point. .

上記耐久試験の結果から、補強部材１１としては、引張降伏伸びを有しない材質であって、かつ、例えばヤング率１５００〜１６００Ｎ／ｍｍ２のベルト１０以上のヤング率を有する例えばポリイミド（ＰＩ）およびポリエチレンナフタレート（ＰＥＮ）が適していることが確認できた。 From the results of the durability test, the reinforcing member 11 is made of a material that does not have tensile yield elongation and has a Young's modulus of, for example, a belt 10 having a Young's modulus of 1500 to 1600 N / mm 2 or more. It was confirmed that polyethylene naphthalate (PEN) was suitable.

なお、上述した実施形態では、ガイド部材１３をベルト１０の幅方向における一方の端部に設けてベルト蛇行規制を行う方式のベルト駆動装置１について説明したが、本発明は図３（Ａ）に示すようにガイド部材１３をベルト１０の幅方向における両端部に設けてベルト蛇行規制を行う方式のものについても適用可能である。   In the above-described embodiment, the belt driving device 1 in which the guide member 13 is provided at one end in the width direction of the belt 10 and the belt meandering restriction is described, but the present invention is illustrated in FIG. As shown, the guide member 13 is provided at both end portions in the width direction of the belt 10 to apply the belt meandering regulation.

ベルト駆動装置の側面図。The side view of a belt drive device. 図１における１つのローラについてのベルト断面を示す図。The figure which shows the belt cross section about the one roller in FIG. ベルトの一端部または両端部にガイド部材を設けたベルト蛇行規制方式を説明するための図。The figure for demonstrating the belt meandering control system which provided the guide member in the one end part or both ends of a belt. ベルト端部の拡大図。The enlarged view of the belt edge part. ベルトのガイド部材がガイド溝の側壁に乗り上げかかった状態を示す図。The figure which shows the state which the guide member of the belt got on the side wall of a guide groove. ベルトにうき・しわが発生した状態を示す図。The figure which shows the state which the wrinkle and wrinkle generate | occur | produced in the belt. ４種類の補強部材の引張試験結果を示す図。The figure which shows the tension test result of four types of reinforcement members.

符号の説明Explanation of symbols

１…ベルト駆動装置、１０…ベルト、１１…補強部材、１２，１４…ローラ、１３…ガイド部材、１６…スプリング、１８…ベルト蛇行規制部材、１８ａ…ガイド溝。
DESCRIPTION OF SYMBOLS 1 ... Belt drive device, 10 ... Belt, 11 ... Reinforcement member, 12, 14 ... Roller, 13 ... Guide member, 16 ... Spring, 18 ... Belt meandering control member, 18a ... Guide groove.

Claims (6)

無端状のベルトの幅方向における少なくとも一方の端部の内周面または外周面に、引張降伏伸びを有しない材質からなる補強部材を貼着したことを特徴とする無端状ベルト。   An endless belt, wherein a reinforcing member made of a material having no tensile yield elongation is attached to an inner peripheral surface or an outer peripheral surface of at least one end portion in the width direction of the endless belt. 前記補強部材が、前記ベルト以上のヤング率を有することを特徴とする請求項１に記載の無端状ベルト。   The endless belt according to claim 1, wherein the reinforcing member has a Young's modulus greater than that of the belt. 前記補強部材が貼着されたベルトの幅方向における端部に、ベルト蛇行規制用のガイド部材を設けたことを特徴とする請求項１または２に記載の無端状ベルト。   The endless belt according to claim 1 or 2, wherein a guide member for belt meandering regulation is provided at an end portion in the width direction of the belt to which the reinforcing member is attached. 前記補強部材がポリイミド樹脂からなることを特徴とする請求項１または２に記載の無端状ベルト。   The endless belt according to claim 1, wherein the reinforcing member is made of polyimide resin. 前記補強部材がポリエチレンナフタレート樹脂からなることを特徴とする請求項１または２に記載の無端状ベルト。   The endless belt according to claim 1, wherein the reinforcing member is made of polyethylene naphthalate resin. 前記補強部材の厚みが１００μｍ以下であることを特徴とする請求項１または２に記載の無端状ベルト。
The endless belt according to claim 1, wherein the reinforcing member has a thickness of 100 μm or less.
JP2003292882A 2003-08-13 2003-08-13 Endless belt Pending JP2005060038A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007078756A (en) * 2005-09-12 2007-03-29 Ricoh Co Ltd Image forming apparatus
JP2007148329A (en) * 2005-11-02 2007-06-14 Nitto Denko Corp Endless belt with meandering prevention guide
JP2007264256A (en) * 2006-03-28 2007-10-11 Ricoh Co Ltd Transfer belt unit and image forming apparatus
JP2009086618A (en) * 2007-09-14 2009-04-23 Ricoh Co Ltd Belt unit and image forming apparatus using the same
JP2009139583A (en) * 2007-12-05 2009-06-25 Nitto Denko Corp Endless belt with meandering preventing guide
JP2013057893A (en) * 2011-09-09 2013-03-28 Brother Ind Ltd Image forming apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007078756A (en) * 2005-09-12 2007-03-29 Ricoh Co Ltd Image forming apparatus
JP4742241B2 (en) * 2005-09-12 2011-08-10 株式会社リコー Image forming apparatus
JP2007148329A (en) * 2005-11-02 2007-06-14 Nitto Denko Corp Endless belt with meandering prevention guide
JP2007264256A (en) * 2006-03-28 2007-10-11 Ricoh Co Ltd Transfer belt unit and image forming apparatus
US8233829B2 (en) 2006-03-28 2012-07-31 Ricoh Company, Ltd. Transfer belt unit and image forming apparatus
US8532547B2 (en) 2006-03-28 2013-09-10 Ricoh Company, Ltd. Transfer belt unit and image forming apparatus
JP2009086618A (en) * 2007-09-14 2009-04-23 Ricoh Co Ltd Belt unit and image forming apparatus using the same
JP2009139583A (en) * 2007-12-05 2009-06-25 Nitto Denko Corp Endless belt with meandering preventing guide
JP2013057893A (en) * 2011-09-09 2013-03-28 Brother Ind Ltd Image forming apparatus

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